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tag modules that may only be loaded once at most especially, and enforce that in the module loader

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git-svn-id: file:///home/lennart/svn/public/pulseaudio/trunk@2043 fefdeb5f-60dc-0310-8127-8f9354f1896f
This commit is contained in:
Lennart Poettering 2007-11-09 18:25:40 +00:00
parent d8e0c1c6bd
commit e313fe1b3d
42 changed files with 233 additions and 160 deletions
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18
src/pulsecore/module.c
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@ -46,6 +46,7 @@
#define PA_SYMBOL_INIT "pa__init"
#define PA_SYMBOL_DONE "pa__done"
#define PA_SYMBOL_LOAD_ONCE "pa__load_once"
#define UNLOAD_POLL_TIME 2
@ -66,6 +67,7 @@ static void timeout_callback(pa_mainloop_api *m, pa_time_event*e, PA_GCC_UNUSED
pa_module* pa_module_load(pa_core *c, const char *name, const char *argument) {
pa_module *m = NULL;
pa_bool_t (*load_once)(void);
pa_assert(c);
pa_assert(name);
@ -82,6 +84,22 @@ pa_module* pa_module_load(pa_core *c, const char *name, const char *argument) {
goto fail;
}
if ((load_once = (pa_bool_t (*)(void)) pa_load_sym(m->dl, name, PA_SYMBOL_LOAD_ONCE))) {
if (load_once()) {
pa_module *i;
uint32_t idx;
/* OK, the module only wants to be loaded once, let's make sure it is */
for (i = pa_idxset_first(c->modules, &idx); i; i = pa_idxset_next(c->modules, &idx)) {
if (strcmp(name, i->name) == 0) {
pa_log("Module \"%s\" should be loaded once at most. Refusing to load.", name);
goto fail;
}
}
}
}
if (!(m->init = (int (*)(pa_module*_m)) pa_load_sym(m->dl, name, PA_SYMBOL_INIT))) {
pa_log("Failed to load module \"%s\": symbol \""PA_SYMBOL_INIT"\" not found.", name);
goto fail;